Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Stock repurchased during period (in shares)			51,384
Stock options exercised (in shares)	35,310	4,950	5,784
Vesting of restricted stock (in shares)	12,712	8,116	5,510
Equity based compensation (in shares)	34,480	27,546	41,644
Cash dividends paid (in dollars per share)	$ 1.00	$ 0.97	$ 0.96